Allow roll add-ons while position-limit freeze is active.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_account_risk_lib.py

@@ -499,7 +499,8 @@ class AccountRiskLibTests(unittest.TestCase):
         self.assertEqual(st["status_label"], "仓位上限冻结")
         self.assertFalse(st["can_trade"])
         self.assertIn("2/2", st["reason"])
-        self.assertIn("不含趋势回调", st["reason"])
+        self.assertIn("顺势加仓", st["reason"])
+        self.assertTrue(st.get("can_roll"))
         self.assertEqual(st["max_active_positions"], 2)
 
     def test_position_limit_normal_when_under_cap(self):